Yes, but it wouldn't do you any good...I'm a assuming you want it so two different people can type at once, or switch off without passing around a keyboard?
Anyhow, I think you can install two keyboards (two USB, USB and PS/2, probably not two PS/2), but Windows doesn't have any support for it, so it would be hard to deal with if you could.
Apple? Macintosh? What are these strange words you speak?